Both these editors allow you to have multiple tabbed windows open at once a number of helpful functions for dealing with code and for general editing. I’m not sure about Notepad++, but I know that TextWrangler has FTP built in.

I consider a good text editor an essential, even if you use a tool like Dreamweaver to do most of your work. I find, for the way I work, that I often open up pages in a text editor for various chores instead of using Dreamweaver – or in addition to using Dreamweaver.